Blow Molding Calculator

Part Geometry & Weight

Shape Body diameter (mm) Height (mm) Wall thickness (mm) Material Flash / scrap factor

Materials · Click a material to load its properties into the calculator.

Part volume (cavity): —

Fill capacity: —

Surface area: —

Part weight: —

Parison & Blow-up Ratio

Blow cavity diameter (mm) Parison (die) diameter (mm) Parison thickness (mm) Wall thickness (target) (mm)

BUR = cavity diameter / parison diameter. Keep 2–4 for even wall.

Blow-up ratio (BUR): —

Required parison thickness: —

Resulting wall (parison/BUR): —

Cooling & Cycle Time

Melt temperature (°C) Mold temperature (°C) Ejection temperature (°C) Thermal conductivity k (W/(m·K)) Specific heat cp (J/(kg·K)) Wall thickness (mm) Parison extrusion time (s) Clamp close/open time (s) Blow time (s) Mold open time (s) Trim / eject time (s) Cavities

α (mm²/s): —

Cooling (solidify) time: —

Total cycle time: —

Parts per hour: —

Clamp / Lock Force

Projected area (auto) (mm²) Blow pressure (MPa) Safety factor

Required clamp force: —

Clamp tonnage: —

Calculation Report

Run a calculation to build the report.